This page will explain how to manually create a CMakeLists.txt
file to link a custom program with CGAL.
A base can be created using the script cgal_create_CMakeLists
. Its usage is detailed in Section Creating a CMake Script for a Program Using CGAL.
Linking with CGAL
To link with the CGAL library, use the following:
add_executable(my_executable my_source_file.cpp)
target_link_libraries(my_executable CGAL::CGAL)
Other CGAL libraries are linked similarly. For example, with CGAL_Core
:
find_package(
CGAL REQUIRED COMPONENTS Core)
target_link_libraries(my_executable CGAL::CGAL CGAL::CGAL_Core)
There are also imported targets to link with CGAL dependencies that can be found in the section Compilers and Third Party Dependencies.
- Note
- The CGAL targets define the following compiler flags:
-frounding-math
with gcc
/fp:strict /fp:except-
with MSVC
Minimal Example Using Qt5
This section describes a minimal example of a program that uses CGAL and Qt5 for some GUI features.
CMakeLists.txt
cmake_minimum_required(VERSION 3.1...3.22)
project(Surface_mesh_Examples)
#CGAL_Qt5 is needed for the drawing.
find_package(
CGAL REQUIRED OPTIONAL_COMPONENTS Qt5)
create_single_source_cgal_program("sm_derivation.cpp")
create_single_source_cgal_program("sm_join.cpp")
create_single_source_cgal_program("sm_aabbtree.cpp")
create_single_source_cgal_program("sm_bgl.cpp")
create_single_source_cgal_program("sm_circulators.cpp")
create_single_source_cgal_program("sm_do_intersect.cpp")
create_single_source_cgal_program("sm_iterators.cpp")
create_single_source_cgal_program("sm_kruskal.cpp")
create_single_source_cgal_program("sm_memory.cpp")
create_single_source_cgal_program("sm_properties.cpp")
create_single_source_cgal_program("sm_draw_small_faces.cpp")
create_single_source_cgal_program("check_orientation.cpp")
#create the executable of the application
create_single_source_cgal_program("draw_surface_mesh.cpp")
if(CGAL_Qt5_FOUND)
#link it with the required CGAL libraries
target_link_libraries(draw_surface_mesh PUBLIC CGAL::CGAL_Basic_viewer)
target_link_libraries(sm_draw_small_faces PUBLIC CGAL::CGAL_Basic_viewer)
endif()
draw_surface_mesh.cpp
#include <CGAL/Simple_cartesian.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/draw_surface_mesh.h>
#include <fstream>
int main(int argc, char* argv[])
{
Mesh sm;
{
std::cerr << "Invalid input file." << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}